The development of a fluorescence turn-on sensor for cysteine, glutathione and other biothiols. A kinetic study
作者:Olimpo García-Beltrán、Natalia Mena、Edwin G. Pérez、Bruce K. Cassels、Marco T. Nuñez、Francisca Werlinger、Daniel Zavala、Margarita E. Aliaga、Paulina Pavez
DOI:10.1016/j.tetlet.2011.09.137
日期:2011.12
(Cys), glutathione (GSH) and other biothiols, such as homocysteine (Hcy) and cysteinyl-glycine (Cys-Gly), were developed. These molecular probes are coumarin-based derivatives containing a chalcone-like moiety that reacts with biothiols through a Michael addition reaction, leading to strong fluorescence enhancements. The reactivity of the tested biothiols toward both probes (ChC1 and ChC2) follows
开发了两种用于检测半胱氨酸(Cys),谷胱甘肽(GSH)和其他生物硫醇(如高半胱氨酸(Hcy)和半胱氨酰甘氨酸(Cys-Gly))的荧光探针。这些分子探针是基于香豆素的衍生物,包含查尔酮样部分,该部分通过迈克尔加成反应与生物硫醇反应,从而导致强烈的荧光增强。被测试的生物硫醇对两种探针(ChC1和ChC2)的反应性依次为Cys> GSH> Hcy> Cys-Gly,ChC1的反应性不如ChC2。评估了对其他氨基酸的可能干扰。ChC1和ChC2 展示了使用硫醇的高度选择性荧光增强作用,使这些探针可用于SH-SY5Y细胞中的荧光硫醇测定。